单项选择题

The word "smog" is formed through ______.

A．backformation
B．blending
C．clipping
D．Derivaation
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单项选择题
—Do you mean that he should prepare for his exam one year in advance—Sure. Anyway, ______.
A．actions speak louder than words
B．better late than never
C．a good beginning is half done
D．the early bird catches the worm
单项选择题
The old man adopted two sons, both of ______ working abroad.
A．whom
B．them
C．that
D．who
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